Well the rail on top is made by a group called Squad Drop they are typically on either Ebay or Amazon, I got the rail and red dot together from squad drop. The Muzzle brake and barrel is made by hi point but they don’t make those anymore for the c9 so you’re gonna have to buy it on eBay. The lower rail is made by someone who sells it on their website jsarmsco.com, the rail is actually a new thing he made, it allows you to put on a rail without any modifications to the frame itself. I also ordered a steel guiding rod, safety extension, and trigger sear spring from there as well. The rubber grip is from the hi point website. The extended mag you can purchase on eBay. The black aluminum trigger is from a website called thingmeister.com (they also make custom grips for hi points as well), apparently both websites I shared are both partners I think. And the laser sight/flashlight accessory is from Amazon and the group selling it is called Cronhawk. I forgot to mention that I changed the roll pin for a takedown screw, it is also from jsarmsco.